concerning
US /kənˈsɝː.nɪŋ/
UK /kənˈsɝː.nɪŋ/

1.
about; regarding
:
•
He received a letter concerning his application.
•
There were many questions concerning the new policy.
1.
causing worry, anxiety, or fear; worrying
:
•
The news of the rising crime rate is very concerning.
•
His sudden change in behavior was quite concerning.